[LLVMdev] gold and debug information

[Guoliang Jin]

  On 7/20/2010 12:48 PM, Jin Guoliang wrote:
>
>
> On Tue, Jul 20, 2010 at 8:49 AM, Rafael Espindola 
> <espindola at google.com <mailto:espindola at google.com>> wrote:
>
>     > export PATH="$LLVMPREFIX/bin:$LLVMGCCPREFIX/bin:$PATH"
>     > export CC="llvm-gcc -use-gold-plugin -Wl,-plugin-opt=also-emit-llvm"
>     > export CXX="llvm-g++ -use-gold-plugin
>     -Wl,-plugin-opt=also-emit-llvm"
>     > export RANLIB=/bin/true
>     > export CFLAGS="-O4 -g"
>     >
>     > then configure, make, and then hit the error.
>     >
>     > The error only happens if the CFLAGS has -g in it.
>
>     Can you reduce the testcase a bit? It would be a lot easier to
>     reproduce with the ld invocation and the .o files given to it.
>
> All the .o files are in the tarball. You can download it here (too 
> large to send through the list): 
> http://pages.cs.wisc.edu/~aliang/goldAndDebugTest.tar.gz 
> <http://pages.cs.wisc.edu/%7Ealiang/goldAndDebugTest.tar.gz>
>
> The command is:
> llvm-gcc -use-gold-plugin -Wl,-plugin-opt=also-emit-
> llvm  -g -O4   -o flex  ccl.o dfa.o ecs.o scanflags.o gen.o main.o 
> misc.o nfa.o parse.o scan.o skel.o sym.o tblcmp.o yylex.o options.o 
> scanopt.o buf.o tables.o tables_shared.o filter.o regex.o  -lm
> Then I got:
> $ llvm-gcc -use-gold-plugin -Wl,-plugin-opt=also-emit-llvm  -g -O4   
> -o flex  ccl.o dfa.o ecs.o scanflags.o gen.o main.o misc.o nfa.o 
> parse.o scan.o skel.o sym.o tblcmp.o yylex.o options.o scanopt.o buf.o 
> tables.o tables_shared.o filter.o regex.o  -lm
> collect2: ld terminated with signal 6 [Aborted]
> /local.toadette/aliang/packages/llvm-2.7/llvm-gcc/lib/gcc/i686-pc-linux-gnu/4.2.1/../../../../i686-pc-linux-gnu/bin/ld: 
> error: buf.o:1:1: invalid character
>
> Unknown constant!
> UNREACHABLE executed at 
> /local.toadette/aliang/fixing/llvm-2.7/llvm-2.7/lib/Bitcode/Writer/BitcodeWriter.cpp:895!
>
> I do not know how to get the ld invocation you need. If this command 
> is not what you need, please tell me how to get the ld invocation.
>
Do you need something else from me to reproduce this?

Thanks,
Guoliang
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